4/ PS - in this study alone, for this one class of medications, changing the default to 90-day supplies meant 57,000 less trips to the pharmacy for our patients! Being a patient on a statin myself, I can tell you it makes it much easier to stay on track

3/ And we appreciate the Editor's Note aligned with the mission of the Penn Medicine Nudge Unit - Making the Right Choice Easy.

Special thanks to Penn Medicine's Kevin Mahoney and the generosity of Adam Berns for enabling this work/

2/ Providing patients with 90-day supplies of their medications (rather than shorter durations) has been shown to increase medication adherence and reduce cardiovascular mortality. The simple default change not only led to 20 percentage point overall improvement, but also reduced disparities...

3/ And we appreciate the @jama.com Editor's Note highlighting the mission of the Penn Medicine Nudge Unit - "Making the Right Choice Easy"

Special thanks to the support from @pennmedicine.bsky.social, CEO Kevin Mahoney, and the generosity of Adam Berns that enabled this effort /

7/ I'm bullish on the opportunity to optimize behavioral engagement in usage based insurance programs (>$30 billion in premiums in North America in 2024), a true win-win opportunity for business and public health. Thank you to Kelsey Bartalozzi and Katie DeGraff for their partnership at GM. /

6/ ✅ In a subgroup of the participants, we tested the same interventions for reducing handheld phone use while driving. The top performing intervention also reduced phone use by 1 minute per hour, but this subgroup was likely underpowered and result was not statistically significant

5/ ✅ The shared prize approach outperformed an approach that promised a chance in a weekly lottery for the full $125 prize for maintaining a streak, or those merely texted personalized feedback on their buckling habits.

4/ ✅ The total cost of incentives for drivers assigned to this 10-week intervention was only $4.40 per driver—a cost that could be sustained within auto-insurance programs that currently offer billions of dollars in safe-driving discounts each year.

3/ ✅ In a follow-up period after the intervention ended, there was a 33% reduction in unbuckled trips, indicating that the *habit persisted*. This is key!

2/ ✅ Drivers were 26% less likely drive unbuckled when they were promised a share of $125 weekly prize money for maintaining a streak of always buckling up. The weekly $125 prizes were divided among drivers who maintained their perfect streak.